创建d3d drawlines函数以在索引0

Question

我有以下代码在整个表单上绘制线条：

 /*  Create GridLines */
 bool CreateGridLines()
{
 RECT rcTabControl;

 GetWindowRect(hwndTabControl, &rcTabControl);
 app_scale_x = (float)((rcTabControl.right - rcTabControl.left) / 96.0);
 app_scale_y = (float)((rcTabControl.bottom - rcTabControl.top) / 96.0);

 /* Get desktop DPI. 
 HDC screen = GetDC(0);
 app_scale_x = (float)(GetDeviceCaps(screen, LOGPIXELSX) / 96.0);
 app_scale_y = (float)(GetDeviceCaps(screen, LOGPIXELSX) / 96.0);
 ReleaseDC(0, screen);*/

 d3d_object = Direct3DCreate9(D3D_SDK_VERSION);

 /* Fill out the presentation parameters for the D3D device... windowed mode. */
 D3DPRESENT_PARAMETERS present;
 fill_out_present(&present, hwnd);


 UINT AdapterToUse = D3DADAPTER_DEFAULT;
 D3DDEVTYPE DeviceType = D3DDEVTYPE_HAL;

 d3d_object->CreateDevice(AdapterToUse, DeviceType, hwnd,
                         D3DCREATE_FPU_PRESERVE | D3DCREATE_SOFTWARE_VERTEXPROCESSING,
                         &present, &d3d_device);

 if (!d3d_device) return false;

 return true; 
}

问题是如何在面板索引0中绘制这条线？我从以下网址获得了这个源代码脚本：

http://braid-game.com/news/wp-content/uploads/2009/01/proof.cpp

我定义并初始化了这样的面板：

 HWND        hwndTabControl;

    /*  CreateTabControl */
 HWND CreateTabControl(HWND hwndParent)
{
 RECT rcClient;
 INITCOMMONCONTROLSEX icex;
 HBITMAP bmpMain;
 HIMAGELIST hwndImageList;
 TCITEM tie;

 /*  Initialize common controls */
 icex.dwSize = sizeof(INITCOMMONCONTROLSEX);
 icex.dwICC  = ICC_TAB_CLASSES;
 InitCommonControlsEx(&icex);

 /*  Create a TabControl of child window size */
 GetClientRect(hwndParent, &rcClient);

 hwndTabControl = CreateWindowEx (
           0,
           WC_TABCONTROL,
           "",
           WS_CHILD | WS_CLIPSIBLINGS | WS_VISIBLE,
           0, 0, rcClient.right, rcClient.bottom,
           hwndParent, NULL, hInstance, NULL);

 if (hwndTabControl == NULL)
 {
    return NULL;
 };

 /* Create ImageList */
hwndImageList = ImageList_Create(12, 9, ILC_COLOR24 | ILC_MASK, 0, 1);
bmpMain =(HBITMAP) LoadImage(NULL, "0.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE);
ImageList_AddMasked(hwndImageList, bmpMain, RGB(255, 255, 255));

 /*  Add Tabs to panel */
 tie.mask = TCIF_TEXT | TCIF_IMAGE;
 tie.iImage = 0;
 tie.pszText = "Untitled";

 if ((TabCtrl_InsertItem(hwndTabControl, 0, &tie) == -1) || (TabCtrl_SetImageList(hwndTabControl, hwndImageList)))
 {
       DestroyWindow(hwndTabControl);
       return NULL;
 }

 /* PanelTab Default font */
 SendMessage(hwndTabControl, WM_SETFONT,(WPARAM)GetStockObject(DEFAULT_GUI_FONT), MAKELPARAM(1,0));

 return hwndTabControl;
}

我刚改变了：

fill_out_present(&present, hwnd);

到

fill_out_present(&present, hwndTabControl);

但是网格是在整个表单窗口上绘制的......我希望它在面板选项卡索引0中...我想我需要在哪些行需要绘制索引...我在左边得到这个我需要在正确的图片上得到这个。

Answer 1

在对宽度/高度和线起点/终点进行计算之前，使用TabCtrl_AdjustRect将客户矩形调整为实际显示区域：

RECT rc;
GetClientRect(hwndTabControl, &rc); // rc will be set to the client area of the tab control
TabCtrl_AdjustRect(hwndTabControl, FALSE, &rc); // rc will be adjusted to the actual display area of the tab control

当前，选项卡控件的客户端矩形从0,0开始，而您实际上希望它从实际显示区域开始的偏移处开始。这就是你在整个表格上画画的原因。